<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scale">
    <title>项目实战-响应式轮播图</title>
    <link rel="stylesheet" href="css/bootstrap.min.css"/>
    <link rel="stylesheet" href="css/style.css"/>

</head>
<body>
<nav class="navbar navbar-default navbar-fixed-top">
    <div class="container">
        <div class="navbar-header">
            <a href="" class="navbar-brand logo">品牌logo</a>
            <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#navbar-collapse">
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
            </button>
        </div>
        <div class="collapse navbar-collapse" id="navbar-collapse">
            <ul class="nav navbar-nav navbar-right">
                <li class="active"><a href=""><span class="glyphicon glyphicon-home"></span> 首页</a></li>
                <li><a href=""><span class="glyphicon glyphicon-list"></span> 咨询</a></li>
                <li><a href=""><span class="glyphicon glyphicon-fire"></span> 案例</a></li>
                <li><a href=""><span class="glyphicon glyphicon-question-sign"></span> 简介</a></li>
            </ul>
        </div>

    </div>
</nav>
<div id="myCarousel" class="carousel slide">
    <ol class="carousel-indicators">
        <li data-target="#myCarousel" data-slide-to="0" class="active"></li>
        <li data-target="#myCarousel" data-slide-to="1"></li>
        <li data-target="#myCarousel" data-slide-to="2"></li>
    </ol>
    <div class="carousel-inner">
        <div class="item active" style="background: #d7eefe;">
            <img src="img/3.jpg" alt="第一张"/>
        </div>
        <div class="item" style="background: #5c29ac;">
            <img src="img/4.jpg" alt="第二张"/>
        </div>
        <div class="item" style="background: #1b1d29;">
            <img src="img/5.jpg" alt="第三张"/>
        </div>
    </div>
    <a href="#myCarousel" data-slide="prev" class="carousel-control left">&lsaquo;</a>
    <a href="#myCarousel" data-slide="next" class="carousel-control right">&rsaquo;</a>
</div>

<script src="js/jquery.min.js"></script>
<script src="js/bootstrap.min.js"></script>
<script>
$(function(){
    //轮播自动播放
    $('#myCarousel').carousel({
        //自动4秒播放
        interval:4000
    });
    //设置垂直居中
    $('.carousel-control').css('line-height',$('.carousel-inner img').height()+'px');
    //当浏览器窗口大小改变时
    $(window).resize(function(){
        var $height=$('.carousel-inner img').eq(0).height()||  //如果没有值，就执行下面的语句
                    $('.carousel-inner img').eq(1).height()||  //如果没有值，就执行下面的语句
                    $('.carousel-inner img').eq(2).height();
        //再垂直居中一下
        $('.carousel-control').css('line-height',$height + 'px');

    });

});

</script>
</body>

</html>